package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 由于employeeDTO中的字段少于数据库中的字段，所以我们不能直接把employeeDTO存储到数据库
     * 而是应该再手动创建一个Employee对象（和数据库是对应的），然后再把employeeDTO中的数据复制到Employee对象中，
     * 缺的其他字段手动补充完毕
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        employee.setName(employeeDTO.getName());
        employee.setUsername(employeeDTO.getUsername());
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        employee.setPhone(employeeDTO.getPhone());
        employee.setSex(employeeDTO.getSex());
        employee.setIdNumber(employeeDTO.getIdNumber());
        //默认启用
        employee.setStatus(StatusConstant.ENABLE);
        //当前时间就是添加用户的时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //????当前登录的管理员的id TODO后期再修改成真实的管理员id
        employee.setCreateUser(1L);
        employee.setUpdateUser(1L);
        //将Employee对象交给mapper，让mapper存储到数据库
        employeeMapper.save(employee);

    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //sql select * from employee where username like '张' limit 10,10
        //使用PageHelper框架（插件）进行分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();//总记录数
        List<Employee> results = page.getResult();//当前页码的数据
        //将查询结果封装成PageResult对象
        PageResult pageResult = new PageResult();
        pageResult.setTotal(total);
        pageResult.setRecords(results);
        return pageResult;
    }

    @Override
    public void startOrStop(Integer status, Long id) {

        Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);
        //补充一个修改时间字段
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(1L);//TODO 后期再修改成真实的管理员id

        employeeMapper.update(employee);
    }

}
